Add support for `d2spr`

### Is your device already requested?

- [x] I have searched the existing issues

### Brand

samsung

### Name

galaxy s3

### Device code

d2spr

### Model

SPH-L710

### Device images

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### Do you own the device and would be willing to test the installer?

- [x] I own the device and am willing to test the installer on it.

### Additional context

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